Tube Holder Dual Variable Flow, only Back Catalog number: 800073 Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 800149 Single Tube Holder Kit, 6 x 70mm (Standard Charcoa Price on request 800075 Tube Holder Quad Variable Flow, only Price on request 800134 Tube Holder Collar Clip, for 7/16" OD, 5/16" ID Tu Price on request